This is the best kept secret in PowerPoint. Being able to print your presenter notes with slides (with multiple slides per page) seems like an obvious feature that Microsoft left out…however it is there (it’s just hiding).
In PowerPoint 2010 go to File > Save & Send > Create Handouts. Then choose Notes next to slides on the prompt. This will convert the PPT to a Word document with the notes next to the slides with three slides to a page.